Caves

Photographs of cave formations around the world.

Modern polar bears all seem to share some genes. It just so happens these genes come from an Irish brown bear living over 20,000 years ago.

Dripstones in Alps cave shed light on mountain growth, ancient climate.

This adventure is not for the faint of heart.

Caves carved by water over eons.

Extreme sinkholes hold surprises inside.

Plant life thrives both inside and outside huge cave.

Son Doong cave big enough to hold a skyscraper.

Whether you think they're inviting or terrifying, caves are made from two tame ingredients.